On the top floor of Yuejie Yongjia Court, at 570 Yongjia Road in Shanghai, the elevator doors open with a soft ding on the fourth floor. Just inside, a low sofa sits beside a fireplace, while a wall of windows is cradled by the green embrace of plane trees. Their shadows sway across the wooden floor, and for a moment, you can't help but think: what a perfect afternoon.